crap2

This word was formerly considered to be taboo, and it was labelled as such in previous editions of Collins English Dictionary. However, it has now become acceptable in speech, although some older or more conservative people may object to its use

Word Origin

C15 crappe chaff, from Middle Dutch, probably from crappen to break off

crap

v.

"defecate," 1846, from one of a cluster of words generally applied to things cast off or discarded (e.g. "weeds growing among corn" (early 15c.), "residue from renderings" (late 15c.), underworld slang for "money" (18c.), and in Shropshire, "dregs of beer or ale"), all probably from Middle English crappe "grain that was trodden underfoot in a barn, chaff" (mid-15c.), from Middle French crape "siftings," from Old French crappe, from Medieval Latin crappa, crapinum "chaff." Related: Crapped; crapping.

Despite folk etymology insistence, not from Thomas Crapper (1837-1910) who was, however, a busy plumber and may have had some minor role in the development of modern toilets. The name Crapper is a northern form of Cropper (attested from 1221), an occupational surname, obviously, but the exact reference is unclear.

crap

n.

"act of defecation," 1898; see crap (v.). Sense of "rubbish, nonsense" also first recorded 1898.

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.Copyright (C) 2007 by HarperCollins Publishers.Cite This Source

Idioms and Phrases with crap out

crap out

1.

Back down, quit, When it got to the point of putting up some money, Jack crapped out. This expression originated in the game of craps, where it means to make a first throw (of the dice) of two, three, or twelve, thereby losing.
[ ; 1920s
]

2.

Go to sleep. This usage was military slang for sleeping during work hours or during a crap game.
[ ; c. 1940
]

3.

Die, as in He's really sick; he could crap out any time. This usage is less common than def. 1 or def. 2.
[ ; 1920s
]